Enqueue state

• Get the incoming packet.

• Allocate a queue to the packet.

• When first packet arrives to the queue, initialize virtual clock and aux virtual clock.

• If there are no packet currently transmitted:

  • extract the packet from queue
  • calculate the packet transmission time
  • issue an interrupt for (simulation time + transmission time).

• Else:

  • calculate the tick step
  • update virtual clock and aux virtual clock values
  • stamp the packet with values.

• Return to the idle state.

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